B4812 (EPCOS)
SAW Components

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SAW Components
Data Sheet B4812


B4812 (EPCOS)
SAW Components

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SAW Components
Low-Loss Filter
Data Sheet
Features
q Low-loss IF filter for mobile telephone
q Channel selection in GSM systems
q Hermetically sealed ceramic SMD package
q Balanced and unbalanced operation possible
Terminals
q Gold-plated Ni
B4812
246,01 MHz
Ceramic package QCC10B
Pin configuration
4
5
9
10
1, 3, 6, 8
2, 7
Input
Input ground or balanced input
Output
Output ground or balanced output
Case – ground
Ground
Dimensions in mm, approx. weight 0,23 g
Type
Ordering code
B4812
B39251-B4812-Z710
Electrostatic Sensitive Device (ESD)
Marking and Package
according to
C61157-A7-A49
Packing
according to
F61074-V8127-Z000
Maximum ratings
Operable temperature range
Storage temperature range
DC voltage
Source power
T
Tstg
VDC
Ps
– 25/+ 85
– 25/+ 85
0
10
˚C
˚C
V
dBm
2 Jul 11, 2003


B4812 (EPCOS)
SAW Components

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SAW Components
Low-Loss Filter
Data Sheet
Characteristics
Reference temperature:
Terminating source impedance:
Terminating load impedance:
Nominal frequency
B4812
246,01 MHz
T = 25 ˚C
ZS = 700 Ohm || -2,6 pF
ZL = 700 Ohm || -2,6 pF
min.
typ. max.
fN — 246,01 —
MHz
Minimum insertion attenuation
(including loss in matching coils)
Amplitude ripple (p-p)
fN - 67,5 kHz ...
fN - 80,0 kHz ...
Group delay ripple (p-p)
fN + 67,5 kHz
fN + 80,0 kHz
fN - 50,0 kHz ... fN + 50,0 kHz
fN - 80,0 kHz ... fN + 80,0 kHz
Relative attenuation (relative to αmin)
fN - 25,00 MHz ... fN - 3,00 MHz
fN - 3,00 MHz ... fN - 1,60 MHz
fN - 1,60 MHz ... fN - 0,60 MHz
fN - 0,60 MHz ... fN - 0,40 MHz
fN - 0,40 MHz ... fN - 0,20 MHz
fN + 0,20 MHz
fN + 0,40 MHz
fN + 0,60 MHz
fN + 1,60 MHz
fN + 3,00 MHz
...
...
...
...
...
fN + 0,40 MHz
fN + 0,60 MHz
fN + 1,60 MHz
fN + 3,00 MHz
fN + 25,00 MHz
Impedance at fN
Input: ZIN = RIN || CIN
Output: ZOUT = ROUT || COUT
Temperature coefficient of frequency 1)
Frequency inversion point
αmin
∆α
∆τ
αrel
TCf
T0
2,0 3,2
— 0,6
— 0,7
— 0,5
— 1,2
50 60
48 60
38 50
28 40
8 14
8 14
28 40
38 50
48 60
50 60
— 700 || 2,6
700 || 2,6
— – 0,036
— 25
1) Temperature dependence of fc: fc(T) = fc(T0)(1 + TCf(T T0)2)
Test matching network to 50 (element values depend on PCB layout):
5,0 dB
2,0 dB
3,0 dB
1,5 µs
3,0 µs
— dB
— dB
— dB
— dB
— dB
— dB
— dB
— dB
— dB
— dB
|| pF
|| pF
— ppm/K2
— ˚C
Cp1 = 1,8 pF
Ls2 = 56 nH
Ls3 = 56 nH
Cp4 = 1,8 pF
3 Jul 11, 2003


B4812 (EPCOS)
SAW Components

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SAW Components
Low-Loss Filter
Data Sheet
Transfer function:
B4812
246,01 MHz
Transfer function (pass band):
4 Jul 11, 2003


B4812 (EPCOS)
SAW Components

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Click to Download PDF File for PC

SAW Components
Low-Loss Filter
Data Sheet
B4812
246,01 MHz
Published by EPCOS AG
Surface Acoustic Wave Components Division, SAW MC WT
P.O. Box 80 17 09, 81617 Munich, GERMANY
© EPCOS AG 2003. Reproduction, publication and dissemination of this brochure and the informa-
tion contained therein without EPCOS’ prior express consent is prohibited.
Purchase orders are subject to the General Conditions for the Supply of Products and Services of
the Electrical and Electronics Industry recommended by the ZVEI (German Electrical and Electronic
Manufacturers’ Association), unless otherwise agreed.
This brochure replaces the previous edition.
For questions on technology, prices and delivery please contact the Sales Offices of EPCOS AG or
the international Representatives.
Due to technical requirements components may contain dangerous substances. For information on
the type in question please also contact one of our Sales Offices.
5 Jul 11, 2003




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